Greg De Temmerman

So long London!!! Today is my last day as a Londoner and from tonight on I will be an Amsterdamer… Mixed feelings as I love London but excited by what is coming

How the cost of useful energy has evolved for fossil fuels and modern “clean” technologies Spot the difference (Talking about costs not prices) www.sciencedirect.com/science/arti...

Great data viz by @ourworldindata.org showing the largest source of electricity in countries across the globe. Clearly a coal cluster in Southeast Asia and a lot of gas countries Nuclear dominates in a few countries only

Europe is too slow on electrification and it is a big problem. Despite 2 major energy crises, the narrative remains vague. The countries (like China) who are pulling ahead will maintain an advantage for quite some time. Nice wake up call from Fatih Birol in @financialtimes.com

Electricity is probably the most versatile form of energy. It can produce force, heat, light, computation, chemicals In addition, the range of electrical power we use spans about 20 orders of magnitude from very low power electronics to the 22.5GW of 3 gorge dam (log scale below)

Electricity is poised to become the workhorse of the energy system. For massive electrification to happen, that electricity needs to be abundant AND cheap. High time for policy-makers to work on electricity prices, the EU industry desperately needs that... www.ft.com/content/f241...

Progress in batteries mean that they can now help decarbonise maritime transport. A recent paper shows that by 2030, electrification could apply to 30% of shipping energy demand and 20% GHG emissions… www.nature.com/articles/s44...

Great read on what AI can do for science. Yes it has the potential to accelerate science but not it will not replace scientists. The paper also makes a great point about the need to maintain critical thinking and not blindly trust results www.amacad.org/publication/...

Hydrogen versus batteries in road transport Hydrogen is far behind in every category one can think of, and the progress in batteries are only extending the gap. Perhaps time to totally stop talking about hydrogen for road transport? Source: www.iea.org/reports/glob...

2025 is now officially the third hottest year in record history. Climate is changing fast and impacts being felt more and more. At this pace, the 1.5 degrees mark will be crossed before 2030 (remember it is a 20-yr average) Source: climate.copernicus.eu/global-clima...

Chinese EVs are cheaper than US EVs BUT also better. The graph below compares the price of both as a function of range. But Chinese cars also offer superior characteristics for example in terms of fast charge Great read here: www.science.org/doi/10.1126/...

New Year, new challenges Happy to share that I'll be working on a new initiative this year to accelerate the emergence of radical ideas to solve big societal challenges and create a pipeline of investable and impactful scientific ventures. We call it RIFF...

This is what the US department of Energy was posting on X (Twitter) before Christmas. Coal is the worst fossil fuel. There is no such thing as clean coal

Interesting graph comparing investments in clean and fossil energy since 2015. techcrunch.com/2025/06/06/c...

It's now official With the 55 other intrepid runners that made the run we entered the @GWR Guinness World Records for the deepest marathon !!! What an adventure it was.

The G-word and why we need to talk about it. In my latest Substack, I lay out some thoughts on Solar Radiation Modification (aka geo-engineering) and why we need more public research on the topic. Please subscribe (and react) riffonsolutions.substack.com/p/we-need-to...

A great graph to explain what the energy transition - electricity is about 20% of final energy demand, we need to electrify most sectors (estimates now show that up to 70% is possible) - electricity is still 60% fossile so we need to decarbonise it ember-energy.org/latest-insig...

There are different ways to measure the global economy - 112 trillion dollars - 600 exajoules of primary energy, 400 in final energy - 107 billion tons of natural resources www.materialflows.net/visualisatio...

When it comes to climate, doomism is a western luxury because we’re less affected. The future is what we make of it… the longer we wait to act the more severe the consequences of climate change will be

Not every day you break a word record. But for me this was yesterday!! We ran the world’s deepest marathon. An impressive immersion in a working mine

2 weeks to go before the World’s deepest marathon- 1.4 km below the surface. This is going to be a world record if we make it and this is also for charity. Any donation is appreciated worldsdeepestmarathon.raiselysite.com/greg-de-temmer…

My family is against electric cars… Have been listening to all the usual misinformation arguments for 90 minutes and people wonder why I am quiet…

The doctor’s waiting room has some great reading 😎 @newscientist.com

A bit of a plug, but quite proud of that interview in @newscientist.com about the work we do at the Foundation. You'll also find how I deal with optimism/pessimism ;-) Thanks @tinymaddie.bsky.social for the great work www.newscientist.com/article/2482...

People often wonder how climate activists stay positive. I feel like I can get behind this method from @gregdt.bsky.social

In 2023, the world produced 4.5 billion tons of oil, 9 billion tons of coal, and 2.5 billion tons of fossil gas (lnkd.in/eUUxhqc5). The combustion of which released about 37 billion tons of CO2 into the atmosphere (lnkd.in/e5t6bdhR) www.circularity-gap.world

Great Sankey diagram about the global material flows of plastics in 2022. About 400 million tons produced. 98% of the feedstock were fossil- coal accounts for 44% and oil for 40% www.nature.com/articles/s43...

L’energie c’est simple et complexe J’ai eu le plaisir de discuter énergie avec Vinz Kanté sur sa chaîne Limit. On part des bases pour discuter de nombreux aspects de la decarbonation. Bonne écoute www.youtube.com/watch?v=Ts_g...

@gregdt.bsky.social chez LIMIT youtu.be/Ts_g_KgC2GE?...

Il est sorti!!!! Une vision complete de la decarbonation des transports passant par l'énergie, l'aménagement des territoires, les politiques publiques et l'économie. Fier d'avoir pu contribuer a ce travail ! www.fnac.com/a21105661/Je...

Last year the share of low carbon electricity in the global mix reached 40% thanks for data deployment of renewables. But fossil production also increased albeit slower. Source ember-energy.org/latest-insig...